学习Maven遇到的一些坑

Maven新建webapp项目index.jsp报错

解决办法：直接在pom.xml文件中添加jar包支持

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<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
</dependency>

maven 不再支持源选项 1.5。请使用 1.6 或更高版本

[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 11 source files to D:\JAVA\JavaWorkspace\IdeaProjects\test2\target\classes
[INFO] ————————————————————-
[ERROR] COMPILATION ERROR :
[INFO] ————————————————————-
[ERROR] 不再支持源选项 1.5。请使用 1.6 或更高版本。
[ERROR] 不再支持目标选项 1.5。请使用 1.6 或更高版本。
[INFO] 2 errors
[INFO] ————————————————————-
[INFO] ————————————————————————
[INFO] BUILD FAILURE
[INFO] ————————————————————————
[INFO] Total time: 53.286 s
[INFO] Finished at: 2017-10-18T17:29:36+08:00
[INFO] Final Memory: 10M/35M
[INFO] ————————————————————————
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project test: Compilation failure: Compilation failure:
[ERROR] 不再支持源选项 1.5。请使用 1.6 或更高版本。
[ERROR] 不再支持目标选项 1.5。请使用 1.6 或更高版本。
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

解决办法：pom.xml文件中增加jdk的设置

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<properties>

  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>

Maven的Pom.xml报错

解决办法：

右键：Maven -> Disable maven nature，

然后右键：​Configure > Convert to maven Project

jetty访问jsp页面出现(PWC6345: There is an error in invoking javac)

解决办法：主要问题还是jetty运行的jre环境配置问题，最终解决方案如下：
在eclipse——>Window——>prefence——>java——>Installed JREs,选择jre点击Edit找到jdk的安装目录，我的安装在C：Program Files/java/jdk1.8.在jdk安装目录下找到jre目录，点击finish。

No plugin found for prefix ‘jetty’ in the current project and in the plugin groups

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C:\myjava\workspace>mvn jetty:run  
[INFO] Scanning for projects...  
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:mave  
n-deploy-plugin:2.7: Failed to parse plugin descriptor for org.apache.maven.plug  
ins:maven-deploy-plugin:2.7 (C:\Documents and Settings\Administrator\.m2\reposit  
ory\org\apache\maven\plugins\maven-deploy-plugin\2.7\maven-deploy-plugin-2.7.jar  
): invalid LOC header (bad signature)  
[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:mave  
n-site-plugin:3.0: Failed to parse plugin descriptor for org.apache.maven.plugin  
s:maven-site-plugin:3.0 (C:\Documents and Settings\Administrator\.m2\repository\  
org\apache\maven\plugins\maven-site-plugin\3.0\maven-site-plugin-3.0.jar): inval  
id LOC header (bad signature)  
Downloading: http://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-  
metadata.xml  
Downloading: http://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadat  
a.xml  
Downloaded: http://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-m  
etadata.xml (11 KB at 10.7 KB/sec)  
Downloaded: http://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata  
.xml (22 KB at 18.2 KB/sec)  
[INFO] ------------------------------------------------------------------------  
[INFO] BUILD FAILURE  
[INFO] ------------------------------------------------------------------------  
[INFO] Total time: 2.110s  
[INFO] Finished at: Sun Jan 03 17:31:20 CST 2018  
[INFO] Final Memory: 4M/15M  
[INFO] ------------------------------------------------------------------------  
[ERROR] No plugin found for prefix 'jetty' in the current project and in the plu  
gin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repo  
sitories [local (C:\Documents and Settings\Administrator\.m2\repository), centra  
l (http://repo.maven.apache.org/maven2)] -> [Help 1]  
[ERROR]  
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit

解决办法：对应项目的pom.xml中plugins的节点下添加配置

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<plugin>  
                <groupId>org.mortbay.jetty</groupId>  
                <artifactId>jetty-maven-plugin</artifactId>  
                <configuration>  
                    <webApp>  
                        <contextPath>/</contextPath>  
                    </webApp>  
                    <stopKey>webx</stopKey>  
                    <stopPort>9999</stopPort>  
                    <connectors>  
                        <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">  
                            <port>8081</port>  
                            <maxIdleTime>60000</maxIdleTime>  
                        </connector>  
                    </connectors>  
                    <requestLog implementation="org.eclipse.jetty.server.NCSARequestLog">  
                        <filename>target/access.log</filename>  
                        <retainDays>90</retainDays>  
                        <append>false</append>  
                        <extended>false</extended>  
                        <logTimeZone>GMT+8:00</logTimeZone>  
                    </requestLog>  
                    <systemProperties>  
                        <systemProperty>  
                            <name>productionMode</name>  
                            <value>${productionMode}</value>  
                        </systemProperty>  
                    </systemProperties>  
                </configuration>  
            </plugin>